Machine for cleaning castings and the like



W. A. HEXT.

- MACHINE FOR CLEANING CASTINGS AND THE LIKE.

APPLICATION FILED JUNE 29.1920. v

1,419,118, mnwuune 6,1922.

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HTTORNEY.

w. A. HEXT.

MACHINE FOR CLEANING CASTINGS AND THE LIKE.

APPLICATION FlLED JUNE 29,1920.

1,419; 18. P tent June 922.

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MACHINE FOR CLEANING CASTINGS AND THE LIKE.

APPLICATION FILED JUNE 25,1920.

4 H ,E w". mm 6. W4 A a P l Elsi WILLIAM A. HEXT, 0F CINCINNATI, ()IIIO, ASSIGNOE 'IO WALTER MACLEOD, 01? CIN- ornnn rr, OHIO.

MACHINE FOR CLEANING CASTINGS AND THE LIKE.

niiaiie.

T 0 all whom it may concern Be it known that I, WILLIAM A. IIEXT, a citizen of the United States, residing at the city of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Machines for Cleaning Castings and the like, of which the following is a specification.

The object of my invention is to produce a machine for cleaning dust, sand, grit and the like, off of castings, and it consists essentially in providing a structure supporting and op erating a rotary table, upon which the castings are placed and which carries said castings with it in a slow rotary movement, and further in providing a nozzle through which a sand blast is forced upon the castings on the table, while the same is rotating very slowly, said nozzle being forced to travel over the face of the castings through an oscillating path or course, which is more rapid of movement than the rotation of the table; the nozzle'during its oscillation being also simultaneously forced to vibrate or be agitated forward and backward very rapidly across the oscillating path. In this manner the sand. blast is directed to all parts of the castings on the table and the blast is forced directly upon said castings and also laterally and sidewise and strikes the castings at every point, no matter what be their shape and contour, thus cleaning them more quickly and more efficiently.

I have also provided a simple and unique mechanism for carrying out the invention in practise, and its various features, and advantages will readily become apparent from the following specification.

In the accompanying drawings forming part of this specification:

Fig. 1, is a front view of the machine,

Fig. 2, is a view of one side thereof,

Fig. 3, is a View of the driving mechanism at the opposite side of that shown in Fig. 2.

Fig. l, is a plan view of parts shown in Fi 3, q

Fig. 5, is a plan view of part of the oscillating carriage and connecting parts and of the operating mechanism for same,

Fig. 6, is a sectional view taken on line 6-6 of Fig. 3,

Fig. 7, is a sectional view on line 77 of Fig. 6,

Fig. 8, is a sectional view on the line 8.--8 of Fig. 6, and

Specification of Letters Patent. Pgmtgntgd J n 5 1922 Application filed June 29, 1920.

Serial No. 392,865.

Fig. 9, is a sectional view on the line 9--9 of Fig. 6.

in carrying out my invention, I provide a box shaped structure or frame work, composed of side walls 1, 1, a back part 2 and a front 3, all held together by supports or angle irons 1, and a top 5 is placed thereon. This structure is partly open at the front. This structure may be made of any form and construction and is used to house and support the operating parts of the machine or apparatus.

Centrally located at the front part of this structure just above referred to, I provide a revolving shaft 6, upon which is supported a revolving or rotary table 7; this shaft 6is stepped in a ball bearing support 8, at the bottom thereof and the table 7 is provided with a peripheral guard 9, to keep the cast-- ings properly on the table. At the front part of the machine, above the table, I place or suspend a curtain 10 to keep sand, grit, dust and the like from flying out into the open. This table 7 is revolved very slowly, and carries the castings and the like to be cleaned or operated upon.

The mechanism for driving and operating the machine is placed at the top thereof, and the drive shaft is marked 12 and'it is journaled at 13 and ld'on supports 15, and the shaft 12 carries the tight and loose pulleys 16. Cn'the shaft 6, at its top, I place a worm wheel 17 which is turned by a worm 18 on the drive shaft 12, when the-shaft 12 is revolved through pulleys 16 being revolved, forcing the worm 18 meshing with the worm wheel 17, which is rigidly held on the shaft 6, thus the table 7, is revolved, carrying the castings thereon with it.

While the table carrying the castings is revolving, I throw a sand blast or the like upon the castings to clean them. To do this Iprovide an oscillating mechanism to continually pass over the surface of the castings, as the same are being carried around on the revolving table 7, in order to reach all the castings, the table 7 revolves very slowly and the continuous oscillating movement of the sand blast means operates faster than the table. I will now describe this oscillating mechanism and its operation.

On the drive shaft 12, I place the small sprocket wheel 19, over which passes the sprocket chain 20, onto and over the large sprocket wheel 21, on a shaft 22, journaled in the bearings 23 and 24, thus the shaft 22 is revolved. At the end of the shaft 22, be-

yond journal 24, I attach a crank arm 25, which carries link 26, the other end of'said link being attached to the oscillating plate plate 28, is also pivotally connected to the plate 27 at point 30 and the link 26 is also pivoted at the point 31, to crank arm 25.

On the top 5, I provide a track or guide way 32, running in the arc of a circle. On the plate 27, I attach a carriage 33, provided with rollers or small. wheels 34, which travel the track 32 when the plate 27 is oscillated through agency of link 26, arm25 and the shaft 22.. The plate 27 is pivotally connected at 35 to a bearing 36 on top 5. The carriage 33 is oscillated from this pivot point 35.

l/Vhen the shaft 22 revolves, it revolves crank arm 25, thus operating link 26 for-' ward and backward, pulling the plate 27 with it, forcing the parts forming the carriage 33 and the blast nozzle 40 and its supports and connections to travel in the arc of a circle to carry out the oscillating movement above referred to herein.

Through the means just above described, thenozzle forcing the sand blast upon the castings is continuously swept or run over the face of the castings, that is, some distance above them, as the table 7 is revolved.

While this oscillating means is operating to reach the castings with the cleaning element, in this case being a nozzle through which a sand blast is forced ontothe castings, the said nozzle is also vibrated to the right and left or at an angle which crosses the path of the oscillating movement, it may be at right angles thereto, or at any other angle. I will now describe this'vertical vibrating action and means for carrying the same into effect. I may say here, that this vertical vibration motion is very rapid and of a greater degree of rapidity than the movement of the oscillating action.

At the outer end of the plate 27 I provide a bearing or support 37, in which is pivotally connected a rocking bearing or shoe 38 at the point 39. In this rocking shoe, I place the upper end of the blast nozzle 40, which terminates in outlet point 41. The nozzle 40 passes down into the body of the machine over the table 7, through a curved slot 42 in the top 5. While the plate 27 is making its oscillating movement, the nozzle 40 moves in the same arc, but is also given a vibrating motion or whipped across the path of the oscillating motion, so as toreach all parts of the castings and clean them more thoroughly.

On the shaft 12, I place the large sprocket wheel 42. over which passes sprocket chain 43, which also passes over the small sprocket wheel A i on the shaft 45,journaled in the bearings l6 and through these means the shaft 45 is-revolved. On: shaft 45, I place a large sprocket wheel {L7 over which rides sprocket chain/l8, passing. over the sprocket 4-9, on shaft 50 thus shafts 45 and 50 are revolved. .At the inner end of the shaft 50,

'journaled in bearings 51, I provide an universal joint 52, which is in a direct line over the pivotal point 35, sothat there will be unity of action between these two points 52 and 35, so that thesame action can be described by the oscillating means and the:

nozzle40, but that the nozzle will also be vibrated or whipped at the same time. One

endof the universal joint 52,.iswattached to:-

shaft50 and the other end to the shaft 53, which extends over and is journaled in the bearings 54. This shaft 53,v atthe end. opposite the universal joint 52, carries an eccentric 55. Between the eccentric 55 and its shaft, andthe rocking shoe 38, I place a place collars 57 and 62, one at each end. The

eccentric carries the pin 56 which enters slot or hole 58 in pivoted collar 57. The collar 57 is held by pivotal studs 60 and the collar 62 by pivotal studs 61. The rocking shoe 38 has, at its rear. end an extension or part 38 which enters the hole 57 in the pivotal collar 62; (see Figs. 6, 7, 8, 9,) thus aconnection'is formed between therevolving eccentric 55 and the rocking shoe 38, so that when the shaft 53 revolves and operates the eccentric, the link formed of plates 59 and its collars 57 and 62 are operated up and down in a peculiar path and the rocking shoe 38 being held in the lower part of the link at 38 as a pivotal point,said shoeis rocked on the bearing pivotal points 39 and thus the shoe is rocked and. the nozzle 40 being carried by the rocking shoe 38, moves.

bratory or whipping motion across the path of oscillation at the same time described by these parts, which has heretofore been clescribed, (see Fig.6), the dotted lines showing the extent of the vibrating motion.

The nozzle 40 as before stated is connected at its upper end to the rocking shoe 38, which rocks on the pivotal points 39, to give to the nozzle itsvibration orwhipping movement herein above referred to and explained;. the eccentric 55 imparting this motion as. shaft 53 revolves, theshoe 38 and itspivotal connections 38 and 39 form a species of universal joint. 5

The. sand blast. comes in at point. 70

through the flexible hose 71 andthence into and through the nozzle 40, through pipe and elbow 72.

The machine is. usually and preferably connected to a sand blast mechanism in order to utilize the sand blast for cleaning the castings, the sand blast entering at point 70 and passing out at 75; this sand blast may be connected and operated in any manner desired in connection with my machine, or any other cleaning element may be employed instead of the sand blast for cleaning the castings or any other articles which need cleaning or treatment.

While I have described one specific method and means for carrying my invention into effect, it will readily become apparent that the same is capable of some change and modifications, without departing from the spirit and principle of the invention, and I wish to be understood as claiming that such modifications will fall within the scope of my invention.

What I claim as new and my invention and desire to secure by Letters Patent is:

1. A cleaning apparatus comprising means for supporting the articles to be treated, a blast nozzle, and means associated with said nozzle for automatically and continuously moving the latter in paths which intersect one another.

2. A cleaning apparatus comprising a member for supporting the articles to be cleaned, a blast nozzle member, means for rotating one of said members, and means for automatically and continuously moving one of said members in a plurality of paths which intersect one another.

3. A cleaning apparatus comprising a rotatable member for supporting the articles to be cleaned, a blast nozzle, and means for automatically moving the said blast nozzle in a plurality of paths which intersect one another.

4. A cleaning apparatus comprising means for supporting the articles to be cleaned, a blast nozzle, means for moving said blast nozzle in a predetermined direction, and means for simultaneously and automatically moving said blast nozzle in a direction at an angle to the first mentioned direction.

5. A cleaning apparatus of the kind defined by claim 4 in which the first mentioned means for moving the blast nozzle includes a support, an arm having one of its ends pivotally connected to said support, and means pivotally connecting the other end of said arm to said nozzle, the axis of the first mentioned pivotal connection being arranged at an angle to the axis of the second mentioned pivotal connection.

6. A cleaning apparatus of the kind defined by claim 4: in which the first mentioned means for moving said nozzle includes a support, an arm pivotally connected to said support, a carriage for supporting said arm, an arc-shaped track mounted on said support and supporting said carriage, and means for pivotally connecting said nozzle to said arm.

7. An apparatus of the kind defined by claim 4 in which the second mentioned means for moving said nozzle includes a rotatable shaft carrying an eccentrically mounted pin, a connecting member having a socket in which said pin is mounted, and means pivotally connecting the connecting member to said nozzle.

8. A cleaning apparatus of the kind defined by claim at in which the second mentioned means for moving said nozzle includes a rotatable shaft carrying an eccentric pin, a collar mounted on said pin, links pivotally connected to said collar by pivot pins having an axis intersecting the axis of said collar, a second collar pivotally connected to said links, and a pin projecting from said nozzle and mounted in the second collar.

9. A cleaning apparatus of the kind defined by claim 4 in which the first mentioned means for moving said nozzle includes a support, an arm having one of its ends pivotally connected to said support and its other end pivotally connected to said nozzle, and in which the second mentioned means for moving said nozzle includes a rotatable shaft having a universal joint arranged in alignment with the pivotal connection of said arm to said support, an eccentric pin carried by said shaft, 2. pin projecting from said 95 nozzle, and means connecting said pins.

10. A cleaning apparatus comprising a rotatable table adapted to support the articles to be cleaned, a support arranged .above said table and having an arc-shaped 1 slot, an arm having one of its ends pivotally connected to said support, a nozzle pivotally connected to said arm and projecting through said slot, means for swinging said arm to cause the nozzle to move in said slot, a shaft having a universal joint arranged in alignment with the joint at which the arm is pivotally connected to said support, an eccentric pin carried by the shaft, means connecting said pin and said nozzle, means 11 for rotating said table, and means for rotating said shaft at a higher speed than the rotation of the table.

In testimony whereof, I aifix my signature at Cincinnati, Ohio, this 17th day of June, 1920.

WILLIAM A. HEXT. 

